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Set Theory, Logic, Probability, Statistics

- Fundamentals: Set theory, logic and proofs. Probability and statistics
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Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:25 AM
micromass
1 27,576
I hope someone can help me prove one of De Morgan's Law: (A intersection B)' = A' U B'
Aug27-11 08:43 PM
phinds
14 128,991
What are the advantages of using the absolute mean deviation over the standard deviation. Is it possible to show a...
Sep1-11 12:28 AM
Twinbee
3 16,264
Suppose we have a directed acyclic graph. The nodes are labeled with integers (which may be negative). Imagine that...
Aug25-11 12:30 AM
mXSCNT
3 1,488
When we refer to terms in an equation, what EXACTLY are we referring to? Suppose for example we have: ab + bc + cd...
Aug22-11 02:42 PM
alexfloo
4 1,982
Hello, I have sample of ~280 measurements. Some are replicates and some are not. I want to remove the...
Aug24-11 09:35 PM
Stephen Tashi
1 1,643
Hi, I'm new to these forums so please redirect me if I've posted this in the wrong place. I'm trying to graduate and...
Aug31-11 09:57 PM
solakis
4 4,053
Suppose you have a set of digits, for the sake of simplicity we'll make them binary, how would you determine the...
Aug21-11 07:39 PM
Hurkyl
3 2,196
The Markov chain, as you know, is a sequence of random variables with the property that any two terms of the sequence...
Aug21-11 06:50 PM
alexfloo
1 761
Hi everyone! I have a question on how to compare two distributions. I'm currently a 2nd year biology grad student,...
Aug23-11 12:22 AM
Stephen Tashi
12 4,792
Dear everyone, consider a function f(x) of a random variable x with average m and probability distribution p(x). ...
Aug23-11 02:30 PM
alexfloo
2 1,166
I've never been exposed to this axiom schemata of replacement before, so here's my understanding of it: the axiom...
Aug23-11 03:30 PM
Hurkyl
1 983
I was reading this up on Wiki so I'll just give a quick overview and then ask my question. Let \cal{S} be an...
Aug25-11 11:16 PM
Kevin_Axion
2 1,168
Being a hobbiest programmer, I know enough about probability to get by. However, I've set myself an impossible (for...
Aug27-11 06:14 AM
lyric
4 1,326
Hi, For a measurement set-up I'm designing, I have to position two sensors which have to be placed at an angle...
Aug24-11 09:48 AM
Stephen Tashi
1 892
The two events A and B have probabilities 0.2 and 0.4. Also P(A intersect B) = 0.08. (a) Are the two events A and...
Aug26-11 05:00 AM
SW VandeCarr
1 1,419
Along 14 separate sections of highway measurements of trac volume (x) and rate of accidents (y) were taken. x;...
Aug26-11 09:51 AM
Stephen Tashi
4 2,238
- Sanders: Statistics: A First Course, 5th ed., ß 7.2, p. 236. Why? The data has not been changed. What difference...
Aug28-11 02:02 PM
Stephen Tashi
14 2,561
What is the difference between sigma algebra and topological space topological space?also what is the meaning of...
Aug25-11 09:52 AM
Rasalhague
2 2,099
Firstly, I would like to say that I am an applied physics major, so my knowledge on probability not relating to...
Aug25-11 04:35 PM
mhyuen
2 749
Does anyone happen to know what the cardinality of the set of ordinal number (transfinite and otherwise) is? A...
Aug27-11 09:06 AM
AlephOmega
4 1,937
From Koosis, I pieced together the following algorithm. Is sigma known? Yes? Then calculate the exact confidence...
Aug27-11 03:35 PM
I like Serena
1 1,184
Hi. I have a proof of a very basic measure theory theorem related to the definition of a measure, and would like to...
Aug26-11 02:15 PM
micromass
4 1,467
Hello! I need your help. Iím really terrible at statistics, probability, permutations, and combinations. Iíve looked...
Aug27-11 06:21 PM
exdejesus
6 2,014
Hi By some googling it seems like there exist some kind of expansion of the Taylor series for statistical...
Aug26-11 03:57 PM
Stephen Tashi
1 1,395
I need to verify this identity: (A\B)\DeltaC = (A\DeltaC)\Delta(A\bigcapB) (with delta standing for the...
Aug27-11 07:19 PM
autre
3 975
Hi everyone, This is not a homework question. I just want to understand an aspect of linear regression better. ...
Aug27-11 11:50 PM
Stephen Tashi
3 2,294
I am working with some wind speed data and need to work out the standard deviation of the magnitude of the horizontal...
Aug30-11 03:47 PM
Stephen Tashi
5 2,525
Hi all I'm having a bit of trouble trying to calculate the Upper and Lower Control Limit on R chart. The file...
Aug28-11 11:42 PM
Apple&Orange
0 753
Hi all, I'm considering a problem of a bunch of particles (say electrons) arriving on a plate. If the plate is...
Aug31-11 10:15 AM
Stephen Tashi
10 1,450
I have 2x10^12 unique sequences of DNA, and I have an average of 47 copies of each sequence (so 94x10^12 DNA molecules...
Aug31-11 03:30 AM
bpet
1 1,168
My question involves supremums and their implications: say I have the sequences \left\{x_{k}\right\}_{k=1}^{\infty}...
Sep1-11 08:19 PM
solakis
2 1,398
Suppose a vector X of length n, where each component of X is normally distributed with mean 0 and variance 1, and...
Aug31-11 06:19 AM
bpet
3 1,093
Hi everyone, This is not a homework question but something I thought of while reading. In the method of...
Aug31-11 07:15 PM
CantorSet
3 1,394
So I took probability last year, and for one of my classes we have an optional refresher worksheet, but I cannot...
Aug29-11 10:53 PM
I like Serena
1 1,049
I read about the differences between Ipv4 and Ipv6, regarding address size. Ipv4 = address size of 32 bits Ipv6 =...
Aug30-11 05:15 AM
chiro
1 1,353
Welcome Using MLE I found that estimator \alpha parametr from Rayleigh distribution is described by formula ...
Aug31-11 02:56 AM
bpet
1 1,395
Hello all, I wonder if anybody knows of a way of generating a random normal vector (i.e. a variate from a...
Sep2-11 12:39 AM
mockle
4 1,248
Hi, I'm having a little trouble understand the idea of closure as so many places seem to describe it differently. ...
Sep1-11 01:43 PM
JimmyK
0 850
Hello. I am wondering if the distributivity theorem works for factoring out more than a single term. ...
Sep1-11 05:26 PM
SpaceDomain
5 1,177
I've never had a basic probability course before, so I've only been able to get my hands on a few materials relating...
Sep2-11 02:39 AM
chiro
3 1,081

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